@misc{Renelt_Heinrich_Mean,
 author={Renelt, Heinrich},
 howpublished={online},
 publisher={Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej},
 language={eng},
 type={artykuł},
 title={Mean Value Properties of Solutions of Cauchy-Riemann systems},
 keywords={Cauchy-Riemann systems},
}